Datasheet4U Logo Datasheet4U.com

A5931-3 - Three-Phase Sensorless Fan Driver

General Description

The A5931-3 three-phase motor driver IC incorporates sensorless sinusoidal drive to minimize vibration for high speed server fans.

Sensorless control eliminates the requirement for Hall sensors for server fan applications.

A flexible closed-loop speed control system is integrated into the IC.

Key Features

  • Closed-loop speed control.
  • Speed curve configuration via EEPROM.
  • Programmable deceleration time.
  • I2C serial port.
  • Sinusoidal modulation for reduced audible noise and low vibration.
  • Sensorless (no Hall sensors required).
  • Low RDS(ON) power MOSFETs.
  • 3 A capability.
  • Minimal external components.
  • PWM speed input.
  • FG speed output.
  • RD rotor lock output.
  • Lock detection.
  • Soft start.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
A59 Cascadable Amplifier MA-COM
A59-1 Cascadable Amplifier MACOM
A5954 4-channel motor servo driver AOTOM
A5970AD Up to 1 A step down-switching regulator STMicroelectronics
A5970D 1.5A switch step down switching regulator STMicroelectronics

Other Datasheets by Allegro MicroSystems

Part Number Description
A5931 Three-Phase Sensorless Fan Driver
A5932 Three-Phase Sinusoidal Sensorless Fan Controller
A5939 Three Phase Sinusoidal Fan Controller
A5929 Automotive Full-Bridge MOSFET Driver
A5940 Three Phase Sensorless Sinusoidal Fan Driver

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
A5931-3 Three-Phase Sensorless Fan Driver IC FEATURES AND BENEFITS • Closed-loop speed control • Speed curve configuration via EEPROM • Programmable deceleration time • I2C serial port • Sinusoidal modulation for reduced audible noise and low vibration • Sensorless (no Hall sensors required) • Low RDS(ON) power MOSFETs—3 A capability • Minimal external components • PWM speed input • FG speed output • RD rotor lock output • Lock detection • Soft start • Standby mode • Shorted load protection DESCRIPTION The A5931-3 three-phase motor driver IC incorporates sensorless sinusoidal drive to minimize vibration for high speed server fans. Sensorless control eliminates the requirement for Hall sensors for server fan applications.